Megger (AVO Biddle) TTRU3 True 3 Phase Transformer Turns Ratiometer

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Manufactured by: Megger (AVO Biddle)

Category: High Current Test Sets

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Rent the Megger TTRU3 3 Phase Transformer Turns Ratiometer (Call for Availability)

The Megger TTRU3 transformer turns ratiometer is engineered with cutting-edge technology to provide comprehensive testing for transformers, making it an essential tool for electrical testing professionals. This state-of-the-art instrument performs a complete suite of measurements in a single device, including advanced 3-phase step-up turns ratio testing, all connected via just one 3-phase lead-set. Its user-friendly 7-inch (180 mm) color touch display enhances visibility and makes operation effortless, while an optional printer ensures that test results are readily available and never lost. Furthermore, the TTRU3 supports remote operation via PC and allows for easy data downloads to USB memory devices.

The TTRU3 is uniquely designed to execute tests on all types of power, instrument, and distribution transformers without the reliance on traditional high voltage excitation. The revolutionary 3-phase excitation method means testing is up to five times faster than conventional single instruments that require phase-by-phase switching, effectively eliminating loading errors associated with delta secondaries and tertiaries. Each phase displacement is managed seamlessly, accommodating standard 3-phase transformer setups with ease. The ability to independently compare phase shift measurement results with expected values for all three phases is an exceptional feature that enhances testing accuracy. The intuitive interface, equipped with large, user-friendly buttons, minimizes the need for extensive operator training, allowing for quick and efficient operation.

Key Features of the Megger TTRU3 3 Phase Transformer Turns Ratiometer Include:

    • Guaranteed accuracy of ±0.05% from -20°C to +50°C
    • 3-Phase test voltage capability of up to 250V
    • Advanced 3-Phase step-up ratio (patent pending)
    • Effortless testing for phase shifting and zig-zag transformers
    • Compact and lightweight design, the smallest and lightest 3-phase test set on the market
    • Rapid testing capabilities, with results in less than 10 seconds


Refer to the datasheet for full specifications.

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